发明授权
- 专利标题： Coordinate input apparatus, its control method, and program
- 专利标题（中）： 坐标输入装置，其控制方法和程序
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申请号： US11076380申请日： 2005-03-09
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公开(公告)号： US07432914B2公开(公告)日： 2008-10-07
- 发明人: Katsuyuki Kobayashi , Yuichiro Yoshimura , Atsushi Tanaka , Kiwamu Kobayashi , Hajime Sato , Masahide Hasegawa
- 申请人： Katsuyuki Kobayashi , Yuichiro Yoshimura , Atsushi Tanaka , Kiwamu Kobayashi , Hajime Sato , Masahide Hasegawa
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Cowan, Liebowitz & Latman, P.C.
- 优先权： JP2004-069482 20040311
- 主分类号： G09F3/041
- IPC分类号： G09F3/041
摘要：
Angle information corresponding to a specified point is calculated on the basis of a change in light amount distribution obtained from at least two sensor units which are arranged on the corner portions of a coordinate input region and receive incoming light. The coordinates of a pointed position on the coordinate input region are calculated on the basis of the calculated angle information. Each of the at least two sensor units includes two light-receiving units being first and second light-receiving units.
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